Bartira (also known as M'bicy, Burtira or Isabel Dias; 1497–1580)[1] was the daughter of Tibiriçá, Chief of the Tupiniquim people of Piratininga and other tribes.
Bartira took the name Isabel Dias and married a Portuguese man, João Ramalho,[2] whose settlement became the nucleus of the modern Brazilian city of São Paulo.
[3] She and Ramalho had a number of children who married into prominent Portuguese/Brazilian families.
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